Add List Names Of Files With Matches as a unix til

README.md

@@ -7,7 +7,7 @@ variety of languages and technologies. These are things that don't really
 warrant a full blog post. These are mostly things I learn by pairing with
 smart people at [Hashrocket](http://hashrocket.com/).
 
-_449 TILs and counting..._
+_450 TILs and counting..._
 
 ---
 
@@ -403,6 +403,7 @@ _449 TILs and counting..._
 - [Last Argument Of The Last Command](unix/last-argument-of-the-last-command.md)
 - [Less With Style](unix/less-with-style.md)
 - [List All Users](unix/list-all-users.md)
+- [List Names Of Files With Matches](unix/list-names-of-files-with-matches.md)
 - [List Of Sessions To A Machine](unix/list-of-sessions-to-a-machine.md)
 - [Only Show The Matches](unix/only-show-the-matches.md)
 - [Open The Current Command In An Editor](unix/open-the-current-command-in-an-editor.md)

unix/list-names-of-files-with-matches.md

@@ -0,0 +1,13 @@
+# List Names Of Files With Matches
+
+I often use `grep` and `ag` to search for patterns in a group or directory
+of files. Generally I am interested in looking at the matching lines
+themselves. However, sometimes I just want to know the set of files that
+have matches. Both `grep` and `ag` can be told to output nothing more than
+the names of the files with matches when given the `-l` flag.
+
+This can come in particularly handy if you just want a list of files that
+can be piped (or copied) for use with another command. This eliminates all
+the extra noise.
+
+h/t Dillon Hafer